/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data --core.log.level.for.class de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN -tc ../../../trunk/examples/toolchains/AutomizerCTransformed.xml -s ../../../trunk/examples/settings/automizer/LoopAccelerationJordanC.epf -i ../../../trunk/examples/svcomp/nla-digbench-scaling/ps6-ll_valuebound10.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-6253b08 [2021-05-06 10:43:10,551 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-05-06 10:43:10,552 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-05-06 10:43:10,596 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-05-06 10:43:10,597 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-05-06 10:43:10,600 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-05-06 10:43:10,603 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-05-06 10:43:10,607 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-05-06 10:43:10,609 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-05-06 10:43:10,613 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-05-06 10:43:10,614 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-05-06 10:43:10,615 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-05-06 10:43:10,616 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-05-06 10:43:10,617 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-05-06 10:43:10,618 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-05-06 10:43:10,620 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-05-06 10:43:10,622 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-05-06 10:43:10,623 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-05-06 10:43:10,625 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-05-06 10:43:10,632 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-05-06 10:43:10,633 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-05-06 10:43:10,634 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-05-06 10:43:10,637 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-05-06 10:43:10,638 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-05-06 10:43:10,644 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-05-06 10:43:10,652 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-05-06 10:43:10,653 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-05-06 10:43:10,654 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-05-06 10:43:10,657 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/LoopAccelerationJordanC.epf [2021-05-06 10:43:10,678 INFO L113 SettingsManager]: Loading preferences was successful [2021-05-06 10:43:10,678 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-05-06 10:43:10,681 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-05-06 10:43:10,681 INFO L138 SettingsManager]: * sizeof long=4 [2021-05-06 10:43:10,681 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-05-06 10:43:10,682 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-05-06 10:43:10,682 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-05-06 10:43:10,682 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-05-06 10:43:10,682 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-05-06 10:43:10,682 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-05-06 10:43:10,683 INFO L138 SettingsManager]: * sizeof long double=12 [2021-05-06 10:43:10,683 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-05-06 10:43:10,683 INFO L138 SettingsManager]: * Use constant arrays=true [2021-05-06 10:43:10,683 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-05-06 10:43:10,684 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-05-06 10:43:10,684 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-05-06 10:43:10,684 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-05-06 10:43:10,684 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-05-06 10:43:10,684 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-06 10:43:10,684 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-05-06 10:43:10,684 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-05-06 10:43:10,686 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2021-05-06 10:43:10,686 INFO L138 SettingsManager]: * TransformationType=LOOP_ACCELERATION_JORDAN WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2021-05-06 10:43:10,985 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-05-06 10:43:11,002 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-05-06 10:43:11,004 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-05-06 10:43:11,005 INFO L271 PluginConnector]: Initializing CDTParser... [2021-05-06 10:43:11,006 INFO L275 PluginConnector]: CDTParser initialized [2021-05-06 10:43:11,006 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/ps6-ll_valuebound10.c [2021-05-06 10:43:11,058 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e432f1e1d/78bc1b56e51c47feab88409ae8ebeb17/FLAG3b302418d [2021-05-06 10:43:11,410 INFO L306 CDTParser]: Found 1 translation units. [2021-05-06 10:43:11,410 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/ps6-ll_valuebound10.c [2021-05-06 10:43:11,416 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e432f1e1d/78bc1b56e51c47feab88409ae8ebeb17/FLAG3b302418d [2021-05-06 10:43:11,434 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e432f1e1d/78bc1b56e51c47feab88409ae8ebeb17 [2021-05-06 10:43:11,436 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-05-06 10:43:11,438 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2021-05-06 10:43:11,441 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-05-06 10:43:11,441 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-05-06 10:43:11,444 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-05-06 10:43:11,445 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.05 10:43:11" (1/1) ... [2021-05-06 10:43:11,446 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@46152981 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 10:43:11, skipping insertion in model container [2021-05-06 10:43:11,446 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.05 10:43:11" (1/1) ... [2021-05-06 10:43:11,452 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-05-06 10:43:11,466 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-05-06 10:43:11,594 WARN L224 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/ps6-ll_valuebound10.c[458,471] [2021-05-06 10:43:11,608 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-06 10:43:11,615 INFO L203 MainTranslator]: Completed pre-run [2021-05-06 10:43:11,626 WARN L224 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/ps6-ll_valuebound10.c[458,471] [2021-05-06 10:43:11,633 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-06 10:43:11,644 INFO L208 MainTranslator]: Completed translation [2021-05-06 10:43:11,645 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 10:43:11 WrapperNode [2021-05-06 10:43:11,645 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-05-06 10:43:11,646 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-05-06 10:43:11,646 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-05-06 10:43:11,646 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-05-06 10:43:11,683 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 10:43:11" (1/1) ... [2021-05-06 10:43:11,683 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 10:43:11" (1/1) ... [2021-05-06 10:43:11,705 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 10:43:11" (1/1) ... [2021-05-06 10:43:11,705 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 10:43:11" (1/1) ... [2021-05-06 10:43:11,726 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 10:43:11" (1/1) ... [2021-05-06 10:43:11,732 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 10:43:11" (1/1) ... [2021-05-06 10:43:11,737 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 10:43:11" (1/1) ... [2021-05-06 10:43:11,742 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-05-06 10:43:11,743 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-05-06 10:43:11,743 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-05-06 10:43:11,744 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-05-06 10:43:11,744 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 10:43:11" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-06 10:43:11,823 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-05-06 10:43:11,824 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-05-06 10:43:11,824 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-05-06 10:43:11,824 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-05-06 10:43:11,824 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-05-06 10:43:11,824 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-05-06 10:43:11,824 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-05-06 10:43:11,825 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-05-06 10:43:11,825 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-05-06 10:43:11,825 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-05-06 10:43:11,825 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_short [2021-05-06 10:43:11,826 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-05-06 10:43:11,826 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-05-06 10:43:11,826 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-05-06 10:43:11,827 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-05-06 10:43:11,827 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-05-06 10:43:11,827 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-05-06 10:43:11,827 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-05-06 10:43:11,828 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-05-06 10:43:11,828 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-05-06 10:43:12,119 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-05-06 10:43:12,119 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2021-05-06 10:43:12,120 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.05 10:43:12 BoogieIcfgContainer [2021-05-06 10:43:12,120 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-05-06 10:43:12,121 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2021-05-06 10:43:12,121 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2021-05-06 10:43:12,122 INFO L275 PluginConnector]: IcfgTransformer initialized [2021-05-06 10:43:12,124 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.05 10:43:12" (1/1) ... [2021-05-06 10:43:12,152 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 06.05 10:43:12 BasicIcfg [2021-05-06 10:43:12,152 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2021-05-06 10:43:12,153 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-05-06 10:43:12,153 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-05-06 10:43:12,155 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-05-06 10:43:12,156 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.05 10:43:11" (1/4) ... [2021-05-06 10:43:12,156 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3d573967 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.05 10:43:12, skipping insertion in model container [2021-05-06 10:43:12,156 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 10:43:11" (2/4) ... [2021-05-06 10:43:12,157 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3d573967 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.05 10:43:12, skipping insertion in model container [2021-05-06 10:43:12,157 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.05 10:43:12" (3/4) ... [2021-05-06 10:43:12,157 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3d573967 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 06.05 10:43:12, skipping insertion in model container [2021-05-06 10:43:12,157 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 06.05 10:43:12" (4/4) ... [2021-05-06 10:43:12,158 INFO L111 eAbstractionObserver]: Analyzing ICFG ps6-ll_valuebound10.cJordan [2021-05-06 10:43:12,162 INFO L149 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:ForwardPredicates Determinization: PREDICATE_ABSTRACTION [2021-05-06 10:43:12,165 INFO L161 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-05-06 10:43:12,179 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-05-06 10:43:12,195 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-05-06 10:43:12,195 INFO L377 AbstractCegarLoop]: Hoare is false [2021-05-06 10:43:12,195 INFO L378 AbstractCegarLoop]: Compute interpolants for ForwardPredicates [2021-05-06 10:43:12,196 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-05-06 10:43:12,196 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-05-06 10:43:12,196 INFO L381 AbstractCegarLoop]: Difference is false [2021-05-06 10:43:12,196 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-05-06 10:43:12,196 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-05-06 10:43:12,214 INFO L276 IsEmpty]: Start isEmpty. Operand has 29 states, 16 states have (on average 1.375) internal successors, (22), 17 states have internal predecessors, (22), 7 states have call successors, (7), 4 states have call predecessors, (7), 4 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2021-05-06 10:43:12,221 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-05-06 10:43:12,222 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 10:43:12,222 INFO L523 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 10:43:12,223 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 10:43:12,230 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 10:43:12,231 INFO L82 PathProgramCache]: Analyzing trace with hash -1187991702, now seen corresponding path program 1 times [2021-05-06 10:43:12,238 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 10:43:12,239 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [778541717] [2021-05-06 10:43:12,239 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 10:43:12,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 10:43:12,455 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 10:43:12,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 10:43:12,469 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-05-06 10:43:12,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 10:43:12,474 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-05-06 10:43:12,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 10:43:12,480 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-06 10:43:12,481 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 10:43:12,481 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [778541717] [2021-05-06 10:43:12,482 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [778541717] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 10:43:12,482 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 10:43:12,482 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-05-06 10:43:12,483 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [737059681] [2021-05-06 10:43:12,486 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-05-06 10:43:12,486 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 10:43:12,500 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-05-06 10:43:12,500 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-06 10:43:12,502 INFO L87 Difference]: Start difference. First operand has 29 states, 16 states have (on average 1.375) internal successors, (22), 17 states have internal predecessors, (22), 7 states have call successors, (7), 4 states have call predecessors, (7), 4 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) Second operand has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-06 10:43:12,579 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 10:43:12,579 INFO L93 Difference]: Finished difference Result 29 states and 32 transitions. [2021-05-06 10:43:12,580 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-05-06 10:43:12,581 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 22 [2021-05-06 10:43:12,581 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 10:43:12,587 INFO L225 Difference]: With dead ends: 29 [2021-05-06 10:43:12,588 INFO L226 Difference]: Without dead ends: 24 [2021-05-06 10:43:12,589 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 53.2ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-06 10:43:12,602 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2021-05-06 10:43:12,614 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2021-05-06 10:43:12,615 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 13 states have (on average 1.1538461538461537) internal successors, (15), 14 states have internal predecessors, (15), 7 states have call successors, (7), 4 states have call predecessors, (7), 3 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2021-05-06 10:43:12,616 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 27 transitions. [2021-05-06 10:43:12,617 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 27 transitions. Word has length 22 [2021-05-06 10:43:12,618 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 10:43:12,618 INFO L480 AbstractCegarLoop]: Abstraction has 24 states and 27 transitions. [2021-05-06 10:43:12,618 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-06 10:43:12,618 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 27 transitions. [2021-05-06 10:43:12,619 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-05-06 10:43:12,620 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 10:43:12,620 INFO L523 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 10:43:12,620 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-05-06 10:43:12,620 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 10:43:12,621 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 10:43:12,621 INFO L82 PathProgramCache]: Analyzing trace with hash 793962506, now seen corresponding path program 1 times [2021-05-06 10:43:12,621 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 10:43:12,621 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [820002015] [2021-05-06 10:43:12,622 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 10:43:12,635 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 10:43:12,636 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [729007587] [2021-05-06 10:43:12,636 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 10:43:12,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 10:43:12,710 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-06 10:43:12,715 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 10:43:12,805 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:43:12,826 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-06 10:43:12,826 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 10:43:12,827 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [820002015] [2021-05-06 10:43:12,827 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 10:43:12,827 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [729007587] [2021-05-06 10:43:12,827 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [729007587] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 10:43:12,827 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 10:43:12,827 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-05-06 10:43:12,828 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [514104271] [2021-05-06 10:43:12,829 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-06 10:43:12,829 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 10:43:12,829 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-06 10:43:12,830 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-05-06 10:43:12,830 INFO L87 Difference]: Start difference. First operand 24 states and 27 transitions. Second operand has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2021-05-06 10:43:12,891 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 10:43:12,892 INFO L93 Difference]: Finished difference Result 33 states and 38 transitions. [2021-05-06 10:43:12,892 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-05-06 10:43:12,892 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 22 [2021-05-06 10:43:12,893 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 10:43:12,893 INFO L225 Difference]: With dead ends: 33 [2021-05-06 10:43:12,894 INFO L226 Difference]: Without dead ends: 31 [2021-05-06 10:43:12,894 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 23.7ms TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-05-06 10:43:12,895 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2021-05-06 10:43:12,899 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2021-05-06 10:43:12,899 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 18 states have (on average 1.1111111111111112) internal successors, (20), 19 states have internal predecessors, (20), 8 states have call successors, (8), 5 states have call predecessors, (8), 4 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-05-06 10:43:12,900 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 34 transitions. [2021-05-06 10:43:12,901 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 34 transitions. Word has length 22 [2021-05-06 10:43:12,901 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 10:43:12,901 INFO L480 AbstractCegarLoop]: Abstraction has 31 states and 34 transitions. [2021-05-06 10:43:12,901 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2021-05-06 10:43:12,901 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 34 transitions. [2021-05-06 10:43:12,902 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-05-06 10:43:12,902 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 10:43:12,902 INFO L523 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 10:43:13,109 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2021-05-06 10:43:13,109 INFO L428 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 10:43:13,110 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 10:43:13,110 INFO L82 PathProgramCache]: Analyzing trace with hash -503871754, now seen corresponding path program 1 times [2021-05-06 10:43:13,110 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 10:43:13,110 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2091000529] [2021-05-06 10:43:13,110 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 10:43:13,123 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 10:43:13,124 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1532602154] [2021-05-06 10:43:13,124 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 10:43:13,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 10:43:13,218 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 11 conjunts are in the unsatisfiable core [2021-05-06 10:43:13,220 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 10:43:13,331 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:43:13,361 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-06 10:43:13,362 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 10:43:13,362 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2091000529] [2021-05-06 10:43:13,362 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 10:43:13,362 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1532602154] [2021-05-06 10:43:13,362 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1532602154] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 10:43:13,362 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 10:43:13,363 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2021-05-06 10:43:13,363 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2020996118] [2021-05-06 10:43:13,363 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-06 10:43:13,363 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 10:43:13,364 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-06 10:43:13,364 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-05-06 10:43:13,364 INFO L87 Difference]: Start difference. First operand 31 states and 34 transitions. Second operand has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 3 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2021-05-06 10:43:13,546 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 10:43:13,546 INFO L93 Difference]: Finished difference Result 40 states and 45 transitions. [2021-05-06 10:43:13,546 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-06 10:43:13,547 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 3 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 29 [2021-05-06 10:43:13,547 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 10:43:13,548 INFO L225 Difference]: With dead ends: 40 [2021-05-06 10:43:13,548 INFO L226 Difference]: Without dead ends: 40 [2021-05-06 10:43:13,548 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 51.3ms TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-05-06 10:43:13,548 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2021-05-06 10:43:13,553 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 39. [2021-05-06 10:43:13,553 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 23 states have (on average 1.1304347826086956) internal successors, (26), 25 states have internal predecessors, (26), 10 states have call successors, (10), 6 states have call predecessors, (10), 5 states have return successors, (8), 7 states have call predecessors, (8), 8 states have call successors, (8) [2021-05-06 10:43:13,554 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 44 transitions. [2021-05-06 10:43:13,554 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 44 transitions. Word has length 29 [2021-05-06 10:43:13,554 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 10:43:13,555 INFO L480 AbstractCegarLoop]: Abstraction has 39 states and 44 transitions. [2021-05-06 10:43:13,555 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 3 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2021-05-06 10:43:13,555 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 44 transitions. [2021-05-06 10:43:13,556 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-05-06 10:43:13,556 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 10:43:13,556 INFO L523 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 10:43:13,763 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 10:43:13,763 INFO L428 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 10:43:13,764 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 10:43:13,764 INFO L82 PathProgramCache]: Analyzing trace with hash 1813677706, now seen corresponding path program 2 times [2021-05-06 10:43:13,764 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 10:43:13,764 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1856899308] [2021-05-06 10:43:13,764 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 10:43:13,775 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 10:43:13,776 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [912992572] [2021-05-06 10:43:13,776 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 10:43:13,993 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-06 10:43:13,993 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 10:43:13,995 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-06 10:43:13,997 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 10:43:14,156 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:43:14,169 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-05-06 10:43:14,169 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 10:43:14,170 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1856899308] [2021-05-06 10:43:14,170 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 10:43:14,170 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [912992572] [2021-05-06 10:43:14,170 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [912992572] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 10:43:14,170 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 10:43:14,170 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2021-05-06 10:43:14,170 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1860198594] [2021-05-06 10:43:14,171 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-06 10:43:14,171 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 10:43:14,171 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-06 10:43:14,171 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-05-06 10:43:14,172 INFO L87 Difference]: Start difference. First operand 39 states and 44 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 6 states have internal predecessors, (18), 4 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2021-05-06 10:43:14,246 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 10:43:14,246 INFO L93 Difference]: Finished difference Result 49 states and 56 transitions. [2021-05-06 10:43:14,247 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-06 10:43:14,247 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 6 states have internal predecessors, (18), 4 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) Word has length 36 [2021-05-06 10:43:14,248 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 10:43:14,248 INFO L225 Difference]: With dead ends: 49 [2021-05-06 10:43:14,248 INFO L226 Difference]: Without dead ends: 49 [2021-05-06 10:43:14,249 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 40.9ms TimeCoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-05-06 10:43:14,249 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2021-05-06 10:43:14,253 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 47. [2021-05-06 10:43:14,254 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 28 states have (on average 1.1428571428571428) internal successors, (32), 31 states have internal predecessors, (32), 12 states have call successors, (12), 7 states have call predecessors, (12), 6 states have return successors, (10), 8 states have call predecessors, (10), 10 states have call successors, (10) [2021-05-06 10:43:14,255 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 54 transitions. [2021-05-06 10:43:14,255 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 54 transitions. Word has length 36 [2021-05-06 10:43:14,255 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 10:43:14,255 INFO L480 AbstractCegarLoop]: Abstraction has 47 states and 54 transitions. [2021-05-06 10:43:14,255 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 6 states have internal predecessors, (18), 4 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2021-05-06 10:43:14,256 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 54 transitions. [2021-05-06 10:43:14,256 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-05-06 10:43:14,257 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 10:43:14,257 INFO L523 BasicCegarLoop]: trace histogram [4, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 10:43:14,465 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 10:43:14,465 INFO L428 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 10:43:14,465 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 10:43:14,465 INFO L82 PathProgramCache]: Analyzing trace with hash 1285656823, now seen corresponding path program 1 times [2021-05-06 10:43:14,466 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 10:43:14,466 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [236232460] [2021-05-06 10:43:14,466 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 10:43:14,477 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 10:43:14,477 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1783351386] [2021-05-06 10:43:14,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 10:43:14,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 10:43:14,550 INFO L263 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 19 conjunts are in the unsatisfiable core [2021-05-06 10:43:14,553 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 10:43:14,622 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:43:14,624 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:43:14,651 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:43:14,661 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:43:14,697 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:43:14,699 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:43:14,700 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:43:14,704 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:43:14,706 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:43:14,707 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:43:14,727 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:43:14,748 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:43:14,750 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:43:14,751 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:43:14,752 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:43:14,778 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:43:14,828 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:43:14,838 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:43:14,849 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:43:14,863 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:43:14,877 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 11 proven. 4 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-05-06 10:43:14,878 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 10:43:14,878 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [236232460] [2021-05-06 10:43:14,878 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 10:43:14,878 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1783351386] [2021-05-06 10:43:14,878 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1783351386] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 10:43:14,878 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 10:43:14,878 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-05-06 10:43:14,878 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [657469026] [2021-05-06 10:43:14,879 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-06 10:43:14,879 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 10:43:14,879 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-06 10:43:14,879 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2021-05-06 10:43:14,879 INFO L87 Difference]: Start difference. First operand 47 states and 54 transitions. Second operand has 10 states, 8 states have (on average 2.5) internal successors, (20), 8 states have internal predecessors, (20), 5 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2021-05-06 10:43:15,102 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 10:43:15,102 INFO L93 Difference]: Finished difference Result 52 states and 58 transitions. [2021-05-06 10:43:15,103 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-06 10:43:15,103 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 8 states have (on average 2.5) internal successors, (20), 8 states have internal predecessors, (20), 5 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) Word has length 40 [2021-05-06 10:43:15,103 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 10:43:15,105 INFO L225 Difference]: With dead ends: 52 [2021-05-06 10:43:15,105 INFO L226 Difference]: Without dead ends: 46 [2021-05-06 10:43:15,105 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 119.5ms TimeCoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2021-05-06 10:43:15,106 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2021-05-06 10:43:15,109 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 46. [2021-05-06 10:43:15,110 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 28 states have (on average 1.1071428571428572) internal successors, (31), 30 states have internal predecessors, (31), 11 states have call successors, (11), 7 states have call predecessors, (11), 6 states have return successors, (9), 8 states have call predecessors, (9), 9 states have call successors, (9) [2021-05-06 10:43:15,110 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 51 transitions. [2021-05-06 10:43:15,110 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 51 transitions. Word has length 40 [2021-05-06 10:43:15,111 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 10:43:15,111 INFO L480 AbstractCegarLoop]: Abstraction has 46 states and 51 transitions. [2021-05-06 10:43:15,111 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 8 states have (on average 2.5) internal successors, (20), 8 states have internal predecessors, (20), 5 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2021-05-06 10:43:15,111 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 51 transitions. [2021-05-06 10:43:15,112 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-05-06 10:43:15,112 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 10:43:15,112 INFO L523 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 10:43:15,312 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 10:43:15,313 INFO L428 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 10:43:15,313 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 10:43:15,313 INFO L82 PathProgramCache]: Analyzing trace with hash -241657738, now seen corresponding path program 3 times [2021-05-06 10:43:15,313 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 10:43:15,314 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2016047139] [2021-05-06 10:43:15,314 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 10:43:15,324 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 10:43:15,324 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [595156208] [2021-05-06 10:43:15,324 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 10:43:16,043 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-05-06 10:43:16,043 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 10:43:16,045 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 12 conjunts are in the unsatisfiable core [2021-05-06 10:43:16,047 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 10:43:16,130 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:43:16,137 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:43:16,152 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:43:16,164 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 19 proven. 1 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2021-05-06 10:43:16,164 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 10:43:16,164 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2016047139] [2021-05-06 10:43:16,165 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 10:43:16,165 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [595156208] [2021-05-06 10:43:16,165 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [595156208] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 10:43:16,165 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 10:43:16,165 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2021-05-06 10:43:16,165 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [95428866] [2021-05-06 10:43:16,165 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-06 10:43:16,165 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 10:43:16,166 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-06 10:43:16,166 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-05-06 10:43:16,166 INFO L87 Difference]: Start difference. First operand 46 states and 51 transitions. Second operand has 7 states, 7 states have (on average 2.857142857142857) internal successors, (20), 6 states have internal predecessors, (20), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 1 states have call successors, (5) [2021-05-06 10:43:16,225 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 10:43:16,226 INFO L93 Difference]: Finished difference Result 50 states and 54 transitions. [2021-05-06 10:43:16,226 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-06 10:43:16,226 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.857142857142857) internal successors, (20), 6 states have internal predecessors, (20), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 1 states have call successors, (5) Word has length 43 [2021-05-06 10:43:16,227 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 10:43:16,228 INFO L225 Difference]: With dead ends: 50 [2021-05-06 10:43:16,229 INFO L226 Difference]: Without dead ends: 48 [2021-05-06 10:43:16,231 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 39.8ms TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-05-06 10:43:16,231 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2021-05-06 10:43:16,245 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 40. [2021-05-06 10:43:16,245 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 25 states have (on average 1.04) internal successors, (26), 25 states have internal predecessors, (26), 9 states have call successors, (9), 7 states have call predecessors, (9), 5 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2021-05-06 10:43:16,246 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 42 transitions. [2021-05-06 10:43:16,246 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 42 transitions. Word has length 43 [2021-05-06 10:43:16,246 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 10:43:16,246 INFO L480 AbstractCegarLoop]: Abstraction has 40 states and 42 transitions. [2021-05-06 10:43:16,246 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.857142857142857) internal successors, (20), 6 states have internal predecessors, (20), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 1 states have call successors, (5) [2021-05-06 10:43:16,246 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 42 transitions. [2021-05-06 10:43:16,247 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-05-06 10:43:16,247 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 10:43:16,247 INFO L523 BasicCegarLoop]: trace histogram [5, 4, 4, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 10:43:16,447 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2021-05-06 10:43:16,447 INFO L428 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 10:43:16,448 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 10:43:16,448 INFO L82 PathProgramCache]: Analyzing trace with hash -542323485, now seen corresponding path program 2 times [2021-05-06 10:43:16,448 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 10:43:16,448 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [38848958] [2021-05-06 10:43:16,448 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 10:43:16,457 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 10:43:16,457 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1607423177] [2021-05-06 10:43:16,457 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 10:43:16,525 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-06 10:43:16,525 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 10:43:16,526 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 16 conjunts are in the unsatisfiable core [2021-05-06 10:43:16,528 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 10:43:16,610 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:43:16,611 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:43:16,613 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:43:16,618 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:43:16,635 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:43:16,651 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:43:16,652 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:43:16,667 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:43:16,676 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:43:16,682 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:43:16,698 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:43:16,710 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 8 proven. 9 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-05-06 10:43:16,710 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 10:43:16,710 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [38848958] [2021-05-06 10:43:16,710 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 10:43:16,710 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1607423177] [2021-05-06 10:43:16,710 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1607423177] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 10:43:16,711 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 10:43:16,711 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-05-06 10:43:16,711 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1429413526] [2021-05-06 10:43:16,711 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-06 10:43:16,711 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 10:43:16,712 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-06 10:43:16,712 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-05-06 10:43:16,712 INFO L87 Difference]: Start difference. First operand 40 states and 42 transitions. Second operand has 8 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 states have internal predecessors, (19), 5 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 5 states have call predecessors, (7), 5 states have call successors, (7) [2021-05-06 10:43:16,820 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 10:43:16,820 INFO L93 Difference]: Finished difference Result 47 states and 51 transitions. [2021-05-06 10:43:16,820 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-06 10:43:16,820 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 states have internal predecessors, (19), 5 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 5 states have call predecessors, (7), 5 states have call successors, (7) Word has length 47 [2021-05-06 10:43:16,822 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 10:43:16,824 INFO L225 Difference]: With dead ends: 47 [2021-05-06 10:43:16,824 INFO L226 Difference]: Without dead ends: 43 [2021-05-06 10:43:16,824 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 56.0ms TimeCoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-05-06 10:43:16,825 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2021-05-06 10:43:16,838 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 43. [2021-05-06 10:43:16,838 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 27 states have (on average 1.037037037037037) internal successors, (28), 27 states have internal predecessors, (28), 10 states have call successors, (10), 7 states have call predecessors, (10), 5 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2021-05-06 10:43:16,839 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 46 transitions. [2021-05-06 10:43:16,839 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 46 transitions. Word has length 47 [2021-05-06 10:43:16,839 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 10:43:16,839 INFO L480 AbstractCegarLoop]: Abstraction has 43 states and 46 transitions. [2021-05-06 10:43:16,839 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 states have internal predecessors, (19), 5 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 5 states have call predecessors, (7), 5 states have call successors, (7) [2021-05-06 10:43:16,840 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 46 transitions. [2021-05-06 10:43:16,840 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-05-06 10:43:16,841 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 10:43:16,841 INFO L523 BasicCegarLoop]: trace histogram [6, 5, 5, 4, 4, 4, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 10:43:17,041 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 10:43:17,042 INFO L428 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 10:43:17,042 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 10:43:17,042 INFO L82 PathProgramCache]: Analyzing trace with hash -2094100617, now seen corresponding path program 3 times [2021-05-06 10:43:17,042 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 10:43:17,043 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [431162034] [2021-05-06 10:43:17,043 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 10:43:17,051 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 10:43:17,051 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1422989349] [2021-05-06 10:43:17,051 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 10:43:17,279 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-05-06 10:43:17,279 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 10:43:17,280 INFO L263 TraceCheckSpWp]: Trace formula consists of 181 conjuncts, 20 conjunts are in the unsatisfiable core [2021-05-06 10:43:17,282 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 10:43:17,390 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:43:17,391 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:43:17,392 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:43:17,392 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:43:17,405 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:43:17,420 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:43:17,421 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:43:17,433 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:43:17,434 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:43:17,438 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:43:17,454 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:43:17,466 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 10 proven. 18 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2021-05-06 10:43:17,466 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 10:43:17,466 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [431162034] [2021-05-06 10:43:17,466 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 10:43:17,466 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1422989349] [2021-05-06 10:43:17,467 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1422989349] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 10:43:17,467 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 10:43:17,467 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2021-05-06 10:43:17,467 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [909837962] [2021-05-06 10:43:17,467 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-06 10:43:17,467 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 10:43:17,468 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-06 10:43:17,468 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2021-05-06 10:43:17,468 INFO L87 Difference]: Start difference. First operand 43 states and 46 transitions. Second operand has 9 states, 8 states have (on average 2.625) internal successors, (21), 8 states have internal predecessors, (21), 6 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (8), 6 states have call predecessors, (8), 6 states have call successors, (8) [2021-05-06 10:43:17,576 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 10:43:17,576 INFO L93 Difference]: Finished difference Result 50 states and 55 transitions. [2021-05-06 10:43:17,576 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-06 10:43:17,576 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 2.625) internal successors, (21), 8 states have internal predecessors, (21), 6 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (8), 6 states have call predecessors, (8), 6 states have call successors, (8) Word has length 54 [2021-05-06 10:43:17,578 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 10:43:17,580 INFO L225 Difference]: With dead ends: 50 [2021-05-06 10:43:17,580 INFO L226 Difference]: Without dead ends: 46 [2021-05-06 10:43:17,580 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 73.7ms TimeCoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2021-05-06 10:43:17,581 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2021-05-06 10:43:17,584 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 46. [2021-05-06 10:43:17,584 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 29 states have (on average 1.0344827586206897) internal successors, (30), 29 states have internal predecessors, (30), 11 states have call successors, (11), 7 states have call predecessors, (11), 5 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2021-05-06 10:43:17,585 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 50 transitions. [2021-05-06 10:43:17,585 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 50 transitions. Word has length 54 [2021-05-06 10:43:17,585 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 10:43:17,585 INFO L480 AbstractCegarLoop]: Abstraction has 46 states and 50 transitions. [2021-05-06 10:43:17,585 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 8 states have (on average 2.625) internal successors, (21), 8 states have internal predecessors, (21), 6 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (8), 6 states have call predecessors, (8), 6 states have call successors, (8) [2021-05-06 10:43:17,585 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 50 transitions. [2021-05-06 10:43:17,591 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2021-05-06 10:43:17,591 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 10:43:17,591 INFO L523 BasicCegarLoop]: trace histogram [7, 6, 6, 5, 5, 5, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 10:43:17,797 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-05-06 10:43:17,798 INFO L428 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 10:43:17,798 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 10:43:17,798 INFO L82 PathProgramCache]: Analyzing trace with hash -826507677, now seen corresponding path program 4 times [2021-05-06 10:43:17,798 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 10:43:17,798 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [137103920] [2021-05-06 10:43:17,798 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 10:43:17,812 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 10:43:17,812 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [126140680] [2021-05-06 10:43:17,812 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 10:43:17,865 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-06 10:43:17,865 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 10:43:17,866 INFO L263 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 24 conjunts are in the unsatisfiable core [2021-05-06 10:43:17,868 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 10:43:17,992 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:43:17,993 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:43:17,994 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:43:17,994 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:43:18,006 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:43:18,023 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:43:18,025 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:43:18,036 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:43:18,037 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:43:18,043 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:43:18,055 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:43:18,067 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 12 proven. 30 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2021-05-06 10:43:18,068 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 10:43:18,068 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [137103920] [2021-05-06 10:43:18,068 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 10:43:18,068 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [126140680] [2021-05-06 10:43:18,068 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [126140680] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 10:43:18,068 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 10:43:18,068 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-05-06 10:43:18,068 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1513833743] [2021-05-06 10:43:18,069 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-06 10:43:18,069 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 10:43:18,069 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-06 10:43:18,069 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2021-05-06 10:43:18,069 INFO L87 Difference]: Start difference. First operand 46 states and 50 transitions. Second operand has 10 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 9 states have internal predecessors, (23), 7 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (9), 7 states have call predecessors, (9), 7 states have call successors, (9) [2021-05-06 10:43:18,207 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 10:43:18,207 INFO L93 Difference]: Finished difference Result 53 states and 59 transitions. [2021-05-06 10:43:18,207 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-06 10:43:18,207 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 9 states have internal predecessors, (23), 7 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (9), 7 states have call predecessors, (9), 7 states have call successors, (9) Word has length 61 [2021-05-06 10:43:18,208 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 10:43:18,208 INFO L225 Difference]: With dead ends: 53 [2021-05-06 10:43:18,208 INFO L226 Difference]: Without dead ends: 49 [2021-05-06 10:43:18,209 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 85.5ms TimeCoverageRelationStatistics Valid=25, Invalid=107, Unknown=0, NotChecked=0, Total=132 [2021-05-06 10:43:18,209 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2021-05-06 10:43:18,211 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 49. [2021-05-06 10:43:18,211 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 31 states have (on average 1.032258064516129) internal successors, (32), 31 states have internal predecessors, (32), 12 states have call successors, (12), 7 states have call predecessors, (12), 5 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2021-05-06 10:43:18,212 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 54 transitions. [2021-05-06 10:43:18,212 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 54 transitions. Word has length 61 [2021-05-06 10:43:18,212 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 10:43:18,212 INFO L480 AbstractCegarLoop]: Abstraction has 49 states and 54 transitions. [2021-05-06 10:43:18,212 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 9 states have internal predecessors, (23), 7 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (9), 7 states have call predecessors, (9), 7 states have call successors, (9) [2021-05-06 10:43:18,212 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 54 transitions. [2021-05-06 10:43:18,213 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2021-05-06 10:43:18,213 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 10:43:18,213 INFO L523 BasicCegarLoop]: trace histogram [8, 7, 7, 6, 6, 6, 5, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 10:43:18,421 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2021-05-06 10:43:18,422 INFO L428 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 10:43:18,422 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 10:43:18,422 INFO L82 PathProgramCache]: Analyzing trace with hash -170119689, now seen corresponding path program 5 times [2021-05-06 10:43:18,422 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 10:43:18,422 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [259570454] [2021-05-06 10:43:18,422 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 10:43:18,431 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 10:43:18,431 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1850441014] [2021-05-06 10:43:18,431 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 10:43:19,088 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-05-06 10:43:19,089 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 10:43:19,090 INFO L263 TraceCheckSpWp]: Trace formula consists of 215 conjuncts, 28 conjunts are in the unsatisfiable core [2021-05-06 10:43:19,092 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 10:43:19,220 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:43:19,220 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:43:19,221 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:43:19,222 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:43:19,231 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:43:19,246 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:43:19,248 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:43:19,257 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:43:19,258 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:43:19,262 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:43:19,282 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:43:19,295 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 14 proven. 45 refuted. 0 times theorem prover too weak. 88 trivial. 0 not checked. [2021-05-06 10:43:19,296 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 10:43:19,296 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [259570454] [2021-05-06 10:43:19,296 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 10:43:19,296 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1850441014] [2021-05-06 10:43:19,296 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1850441014] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 10:43:19,296 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 10:43:19,296 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-05-06 10:43:19,296 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [795256371] [2021-05-06 10:43:19,297 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-06 10:43:19,297 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 10:43:19,297 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-06 10:43:19,297 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2021-05-06 10:43:19,297 INFO L87 Difference]: Start difference. First operand 49 states and 54 transitions. Second operand has 11 states, 10 states have (on average 2.5) internal successors, (25), 10 states have internal predecessors, (25), 8 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (10), 8 states have call predecessors, (10), 8 states have call successors, (10) [2021-05-06 10:43:19,438 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 10:43:19,438 INFO L93 Difference]: Finished difference Result 56 states and 63 transitions. [2021-05-06 10:43:19,438 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-06 10:43:19,439 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 2.5) internal successors, (25), 10 states have internal predecessors, (25), 8 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (10), 8 states have call predecessors, (10), 8 states have call successors, (10) Word has length 68 [2021-05-06 10:43:19,439 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 10:43:19,439 INFO L225 Difference]: With dead ends: 56 [2021-05-06 10:43:19,439 INFO L226 Difference]: Without dead ends: 52 [2021-05-06 10:43:19,440 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 87.8ms TimeCoverageRelationStatistics Valid=27, Invalid=129, Unknown=0, NotChecked=0, Total=156 [2021-05-06 10:43:19,440 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2021-05-06 10:43:19,442 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 52. [2021-05-06 10:43:19,443 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 33 states have (on average 1.0303030303030303) internal successors, (34), 33 states have internal predecessors, (34), 13 states have call successors, (13), 7 states have call predecessors, (13), 5 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2021-05-06 10:43:19,443 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 58 transitions. [2021-05-06 10:43:19,443 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 58 transitions. Word has length 68 [2021-05-06 10:43:19,444 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 10:43:19,444 INFO L480 AbstractCegarLoop]: Abstraction has 52 states and 58 transitions. [2021-05-06 10:43:19,444 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 10 states have (on average 2.5) internal successors, (25), 10 states have internal predecessors, (25), 8 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (10), 8 states have call predecessors, (10), 8 states have call successors, (10) [2021-05-06 10:43:19,444 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 58 transitions. [2021-05-06 10:43:19,445 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-05-06 10:43:19,445 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 10:43:19,445 INFO L523 BasicCegarLoop]: trace histogram [9, 8, 8, 7, 7, 7, 6, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 10:43:19,654 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 10:43:19,654 INFO L428 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 10:43:19,654 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 10:43:19,655 INFO L82 PathProgramCache]: Analyzing trace with hash 1505202147, now seen corresponding path program 6 times [2021-05-06 10:43:19,655 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 10:43:19,655 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [419335545] [2021-05-06 10:43:19,655 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 10:43:19,663 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 10:43:19,663 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1468319099] [2021-05-06 10:43:19,663 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 10:43:24,242 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-05-06 10:43:24,242 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 10:43:24,251 INFO L263 TraceCheckSpWp]: Trace formula consists of 232 conjuncts, 33 conjunts are in the unsatisfiable core [2021-05-06 10:43:24,253 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 10:43:24,336 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:43:24,337 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:43:24,370 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:43:24,371 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:43:24,395 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:43:24,397 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:43:24,423 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:43:24,424 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:43:24,450 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:43:24,450 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:43:24,452 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:43:24,452 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:43:24,461 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:43:24,477 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:43:24,484 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:43:24,493 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:43:24,495 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:43:24,500 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:43:24,513 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:43:24,528 INFO L134 CoverageAnalysis]: Checked inductivity of 195 backedges. 16 proven. 63 refuted. 0 times theorem prover too weak. 116 trivial. 0 not checked. [2021-05-06 10:43:24,528 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 10:43:24,528 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [419335545] [2021-05-06 10:43:24,528 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 10:43:24,528 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1468319099] [2021-05-06 10:43:24,528 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1468319099] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 10:43:24,528 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 10:43:24,529 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2021-05-06 10:43:24,529 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2107953411] [2021-05-06 10:43:24,529 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-06 10:43:24,530 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 10:43:24,530 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-06 10:43:24,530 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=111, Unknown=0, NotChecked=0, Total=132 [2021-05-06 10:43:24,530 INFO L87 Difference]: Start difference. First operand 52 states and 58 transitions. Second operand has 12 states, 11 states have (on average 2.4545454545454546) internal successors, (27), 11 states have internal predecessors, (27), 9 states have call successors, (13), 2 states have call predecessors, (13), 1 states have return successors, (11), 9 states have call predecessors, (11), 9 states have call successors, (11) [2021-05-06 10:43:24,703 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 10:43:24,703 INFO L93 Difference]: Finished difference Result 59 states and 67 transitions. [2021-05-06 10:43:24,703 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-05-06 10:43:24,703 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 2.4545454545454546) internal successors, (27), 11 states have internal predecessors, (27), 9 states have call successors, (13), 2 states have call predecessors, (13), 1 states have return successors, (11), 9 states have call predecessors, (11), 9 states have call successors, (11) Word has length 75 [2021-05-06 10:43:24,703 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 10:43:24,709 INFO L225 Difference]: With dead ends: 59 [2021-05-06 10:43:24,709 INFO L226 Difference]: Without dead ends: 55 [2021-05-06 10:43:24,709 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 107.7ms TimeCoverageRelationStatistics Valid=29, Invalid=153, Unknown=0, NotChecked=0, Total=182 [2021-05-06 10:43:24,710 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2021-05-06 10:43:24,712 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 55. [2021-05-06 10:43:24,712 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 35 states have (on average 1.0285714285714285) internal successors, (36), 35 states have internal predecessors, (36), 14 states have call successors, (14), 7 states have call predecessors, (14), 5 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2021-05-06 10:43:24,715 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 62 transitions. [2021-05-06 10:43:24,715 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 62 transitions. Word has length 75 [2021-05-06 10:43:24,716 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 10:43:24,716 INFO L480 AbstractCegarLoop]: Abstraction has 55 states and 62 transitions. [2021-05-06 10:43:24,717 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 11 states have (on average 2.4545454545454546) internal successors, (27), 11 states have internal predecessors, (27), 9 states have call successors, (13), 2 states have call predecessors, (13), 1 states have return successors, (11), 9 states have call predecessors, (11), 9 states have call successors, (11) [2021-05-06 10:43:24,717 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 62 transitions. [2021-05-06 10:43:24,719 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2021-05-06 10:43:24,719 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 10:43:24,719 INFO L523 BasicCegarLoop]: trace histogram [10, 9, 9, 8, 8, 8, 7, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 10:43:24,925 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-05-06 10:43:24,925 INFO L428 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 10:43:24,925 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 10:43:24,926 INFO L82 PathProgramCache]: Analyzing trace with hash 252865655, now seen corresponding path program 7 times [2021-05-06 10:43:24,926 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 10:43:24,926 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [739354742] [2021-05-06 10:43:24,926 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 10:43:24,932 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 10:43:24,932 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1592322821] [2021-05-06 10:43:24,932 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 10:43:25,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 10:43:25,582 INFO L263 TraceCheckSpWp]: Trace formula consists of 249 conjuncts, 36 conjunts are in the unsatisfiable core [2021-05-06 10:43:25,584 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 10:43:25,777 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:43:25,778 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:43:25,779 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:43:25,779 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:43:25,792 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:43:25,809 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:43:25,810 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:43:25,821 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:43:25,822 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:43:25,826 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:43:25,840 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:43:25,865 INFO L134 CoverageAnalysis]: Checked inductivity of 250 backedges. 18 proven. 84 refuted. 0 times theorem prover too weak. 148 trivial. 0 not checked. [2021-05-06 10:43:25,865 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 10:43:25,865 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [739354742] [2021-05-06 10:43:25,865 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 10:43:25,865 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1592322821] [2021-05-06 10:43:25,865 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1592322821] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 10:43:25,865 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 10:43:25,865 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2021-05-06 10:43:25,866 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [13076326] [2021-05-06 10:43:25,866 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-05-06 10:43:25,866 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 10:43:25,867 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-05-06 10:43:25,867 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=133, Unknown=0, NotChecked=0, Total=156 [2021-05-06 10:43:25,867 INFO L87 Difference]: Start difference. First operand 55 states and 62 transitions. Second operand has 13 states, 12 states have (on average 2.4166666666666665) internal successors, (29), 12 states have internal predecessors, (29), 10 states have call successors, (14), 2 states have call predecessors, (14), 1 states have return successors, (12), 10 states have call predecessors, (12), 10 states have call successors, (12) [2021-05-06 10:43:26,057 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 10:43:26,057 INFO L93 Difference]: Finished difference Result 62 states and 71 transitions. [2021-05-06 10:43:26,058 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-05-06 10:43:26,058 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 2.4166666666666665) internal successors, (29), 12 states have internal predecessors, (29), 10 states have call successors, (14), 2 states have call predecessors, (14), 1 states have return successors, (12), 10 states have call predecessors, (12), 10 states have call successors, (12) Word has length 82 [2021-05-06 10:43:26,058 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 10:43:26,059 INFO L225 Difference]: With dead ends: 62 [2021-05-06 10:43:26,059 INFO L226 Difference]: Without dead ends: 58 [2021-05-06 10:43:26,059 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 70 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 126.0ms TimeCoverageRelationStatistics Valid=31, Invalid=179, Unknown=0, NotChecked=0, Total=210 [2021-05-06 10:43:26,059 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2021-05-06 10:43:26,062 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 58. [2021-05-06 10:43:26,062 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 37 states have (on average 1.027027027027027) internal successors, (38), 37 states have internal predecessors, (38), 15 states have call successors, (15), 7 states have call predecessors, (15), 5 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2021-05-06 10:43:26,063 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 66 transitions. [2021-05-06 10:43:26,063 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 66 transitions. Word has length 82 [2021-05-06 10:43:26,063 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 10:43:26,063 INFO L480 AbstractCegarLoop]: Abstraction has 58 states and 66 transitions. [2021-05-06 10:43:26,063 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 12 states have (on average 2.4166666666666665) internal successors, (29), 12 states have internal predecessors, (29), 10 states have call successors, (14), 2 states have call predecessors, (14), 1 states have return successors, (12), 10 states have call predecessors, (12), 10 states have call successors, (12) [2021-05-06 10:43:26,064 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 66 transitions. [2021-05-06 10:43:26,064 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2021-05-06 10:43:26,064 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 10:43:26,064 INFO L523 BasicCegarLoop]: trace histogram [11, 10, 10, 9, 9, 9, 8, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 10:43:26,269 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-05-06 10:43:26,269 INFO L428 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 10:43:26,269 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 10:43:26,269 INFO L82 PathProgramCache]: Analyzing trace with hash 288751971, now seen corresponding path program 8 times [2021-05-06 10:43:26,269 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 10:43:26,269 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1659071416] [2021-05-06 10:43:26,270 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 10:43:26,275 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 10:43:26,275 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [727001124] [2021-05-06 10:43:26,275 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 10:43:27,022 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-06 10:43:27,022 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 10:43:27,024 INFO L263 TraceCheckSpWp]: Trace formula consists of 266 conjuncts, 40 conjunts are in the unsatisfiable core [2021-05-06 10:43:27,026 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 10:43:27,224 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:43:27,225 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:43:27,226 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:43:27,227 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:43:27,236 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:43:27,253 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:43:27,255 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:43:27,264 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:43:27,265 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:43:27,268 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:43:27,284 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:43:27,301 INFO L134 CoverageAnalysis]: Checked inductivity of 312 backedges. 20 proven. 108 refuted. 0 times theorem prover too weak. 184 trivial. 0 not checked. [2021-05-06 10:43:27,301 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 10:43:27,302 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1659071416] [2021-05-06 10:43:27,302 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 10:43:27,302 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [727001124] [2021-05-06 10:43:27,302 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [727001124] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 10:43:27,302 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 10:43:27,302 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2021-05-06 10:43:27,302 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [9405284] [2021-05-06 10:43:27,303 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-05-06 10:43:27,303 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 10:43:27,305 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-05-06 10:43:27,305 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=157, Unknown=0, NotChecked=0, Total=182 [2021-05-06 10:43:27,305 INFO L87 Difference]: Start difference. First operand 58 states and 66 transitions. Second operand has 14 states, 13 states have (on average 2.3846153846153846) internal successors, (31), 13 states have internal predecessors, (31), 11 states have call successors, (15), 2 states have call predecessors, (15), 1 states have return successors, (13), 11 states have call predecessors, (13), 11 states have call successors, (13) [2021-05-06 10:43:27,516 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 10:43:27,516 INFO L93 Difference]: Finished difference Result 65 states and 75 transitions. [2021-05-06 10:43:27,516 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-05-06 10:43:27,517 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 2.3846153846153846) internal successors, (31), 13 states have internal predecessors, (31), 11 states have call successors, (15), 2 states have call predecessors, (15), 1 states have return successors, (13), 11 states have call predecessors, (13), 11 states have call successors, (13) Word has length 89 [2021-05-06 10:43:27,517 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 10:43:27,517 INFO L225 Difference]: With dead ends: 65 [2021-05-06 10:43:27,517 INFO L226 Difference]: Without dead ends: 61 [2021-05-06 10:43:27,518 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 76 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 138.2ms TimeCoverageRelationStatistics Valid=33, Invalid=207, Unknown=0, NotChecked=0, Total=240 [2021-05-06 10:43:27,518 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2021-05-06 10:43:27,520 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 61. [2021-05-06 10:43:27,520 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 39 states have (on average 1.0256410256410255) internal successors, (40), 39 states have internal predecessors, (40), 16 states have call successors, (16), 7 states have call predecessors, (16), 5 states have return successors, (14), 14 states have call predecessors, (14), 14 states have call successors, (14) [2021-05-06 10:43:27,521 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 70 transitions. [2021-05-06 10:43:27,521 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 70 transitions. Word has length 89 [2021-05-06 10:43:27,521 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 10:43:27,521 INFO L480 AbstractCegarLoop]: Abstraction has 61 states and 70 transitions. [2021-05-06 10:43:27,522 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 13 states have (on average 2.3846153846153846) internal successors, (31), 13 states have internal predecessors, (31), 11 states have call successors, (15), 2 states have call predecessors, (15), 1 states have return successors, (13), 11 states have call predecessors, (13), 11 states have call successors, (13) [2021-05-06 10:43:27,522 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 70 transitions. [2021-05-06 10:43:27,522 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2021-05-06 10:43:27,522 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 10:43:27,522 INFO L523 BasicCegarLoop]: trace histogram [12, 11, 11, 10, 10, 10, 9, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 10:43:27,728 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,13 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 10:43:27,728 INFO L428 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 10:43:27,729 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 10:43:27,729 INFO L82 PathProgramCache]: Analyzing trace with hash -482784521, now seen corresponding path program 9 times [2021-05-06 10:43:27,729 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 10:43:27,729 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [465692906] [2021-05-06 10:43:27,729 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 10:43:27,737 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 10:43:27,737 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [641759868] [2021-05-06 10:43:27,737 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true